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clk-fixes-for-linus contains three NULL pointer fixes and two device

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regression fixups.  Two NULL pointer dereferences were in the common clk
 core due to lack of sanity checking and the third NPD was in the
 mxs-specific clock code due to incorrect use of __initdata.  The device
 regressions were the result of improper data: a wrong string name for
 matching DT data broke the SPEAr ethernet controller and another string
 matching problem in the mxs clock data resulted in a broken MMC
 controller.
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Merge tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mturquette/linux

Pull clk common framework fixes from Mike Turquette:
 "This contains three NULL pointer fixes and two device regression
  fixups.

  Two NULL pointer dereferences were in the common clk core due to lack
  of sanity checking and the third NPD was in the mxs-specific clock
  code due to incorrect use of __initdata.

  The device regressions were the result of improper data: a wrong
  string name for matching DT data broke the SPEAr ethernet controller
  and another string matching problem in the mxs clock data resulted in
  a broken MMC controller."

* tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mturquette/linux:
  clk: mxs: fix clock lookup after freeing init memory
  clk: mxs: fix ref_io clock definition
  clk: Check parent for NULL in clk_change_rate
  clk: Allow late cache allocation for clk->parents
  clk: SPEAr600: Fix ethernet clock name for DT based probing
This commit is contained in:
Linus Torvalds 2012-06-27 12:44:58 -07:00
commit e04fb0202b
4 changed files with 40 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/clk/clk.c
View File

@ -850,18 +850,21 @@ static void clk_change_rate(struct clk *clk)
{
struct clk *child;
unsigned long old_rate;
unsigned long best_parent_rate = 0;
struct hlist_node *tmp;
old_rate = clk->rate;
if (clk->parent)
best_parent_rate = clk->parent->rate;
if (clk->ops->set_rate)
clk->ops->set_rate(clk->hw, clk->new_rate, clk->parent->rate);
clk->ops->set_rate(clk->hw, clk->new_rate, best_parent_rate);
if (clk->ops->recalc_rate)
clk->rate = clk->ops->recalc_rate(clk->hw,
clk->parent->rate);
clk->rate = clk->ops->recalc_rate(clk->hw, best_parent_rate);
else
clk->rate = clk->parent->rate;
clk->rate = best_parent_rate;
if (clk->notifier_count && old_rate != clk->rate)
__clk_notify(clk, POST_RATE_CHANGE, old_rate, clk->rate);
@ -999,7 +1002,7 @@ static struct clk *__clk_init_parent(struct clk *clk)
if (!clk->parents)
clk->parents =
kmalloc((sizeof(struct clk*) * clk->num_parents),
kzalloc((sizeof(struct clk*) * clk->num_parents),
GFP_KERNEL);
if (!clk->parents)
@ -1065,9 +1068,13 @@ static int __clk_set_parent(struct clk *clk, struct clk *parent)
old_parent = clk->parent;
/* find index of new parent clock using cached parent ptrs */
for (i = 0; i < clk->num_parents; i++)
if (clk->parents[i] == parent)
break;
if (clk->parents)
for (i = 0; i < clk->num_parents; i++)
if (clk->parents[i] == parent)
break;
else
clk->parents = kzalloc((sizeof(struct clk*) * clk->num_parents),
GFP_KERNEL);
/*
* find index of new parent clock using string name comparison
@ -1076,7 +1083,8 @@ static int __clk_set_parent(struct clk *clk, struct clk *parent)
if (i == clk->num_parents)
for (i = 0; i < clk->num_parents; i++)
if (!strcmp(clk->parent_names[i], parent->name)) {
clk->parents[i] = __clk_lookup(parent->name);
if (clk->parents)
clk->parents[i] = __clk_lookup(parent->name);
break;
}

12
drivers/clk/mxs/clk-imx23.c
View File

@ -71,7 +71,7 @@ static void __init clk_misc_init(void)
__mxs_setl(30 << BP_FRAC_IOFRAC, FRAC);
}
static struct clk_lookup uart_lookups[] __initdata = {
static struct clk_lookup uart_lookups[] = {
{ .dev_id = "duart", },
{ .dev_id = "mxs-auart.0", },
{ .dev_id = "mxs-auart.1", },
@ -80,31 +80,31 @@ static struct clk_lookup uart_lookups[] __initdata = {
{ .dev_id = "80070000.serial", },
};
static struct clk_lookup hbus_lookups[] __initdata = {
static struct clk_lookup hbus_lookups[] = {
{ .dev_id = "imx23-dma-apbh", },
{ .dev_id = "80004000.dma-apbh", },
};
static struct clk_lookup xbus_lookups[] __initdata = {
static struct clk_lookup xbus_lookups[] = {
{ .dev_id = "duart", .con_id = "apb_pclk"},
{ .dev_id = "80070000.serial", .con_id = "apb_pclk"},
{ .dev_id = "imx23-dma-apbx", },
{ .dev_id = "80024000.dma-apbx", },
};
static struct clk_lookup ssp_lookups[] __initdata = {
static struct clk_lookup ssp_lookups[] = {
{ .dev_id = "imx23-mmc.0", },
{ .dev_id = "imx23-mmc.1", },
{ .dev_id = "80010000.ssp", },
{ .dev_id = "80034000.ssp", },
};
static struct clk_lookup lcdif_lookups[] __initdata = {
static struct clk_lookup lcdif_lookups[] = {
{ .dev_id = "imx23-fb", },
{ .dev_id = "80030000.lcdif", },
};
static struct clk_lookup gpmi_lookups[] __initdata = {
static struct clk_lookup gpmi_lookups[] = {
{ .dev_id = "imx23-gpmi-nand", },
{ .dev_id = "8000c000.gpmi", },
};

32
drivers/clk/mxs/clk-imx28.c
View File

@ -120,7 +120,7 @@ static void __init clk_misc_init(void)
writel_relaxed(val, FRAC0);
}
static struct clk_lookup uart_lookups[] __initdata = {
static struct clk_lookup uart_lookups[] = {
{ .dev_id = "duart", },
{ .dev_id = "mxs-auart.0", },
{ .dev_id = "mxs-auart.1", },
@ -135,71 +135,71 @@ static struct clk_lookup uart_lookups[] __initdata = {
{ .dev_id = "80074000.serial", },
};
static struct clk_lookup hbus_lookups[] __initdata = {
static struct clk_lookup hbus_lookups[] = {
{ .dev_id = "imx28-dma-apbh", },
{ .dev_id = "80004000.dma-apbh", },
};
static struct clk_lookup xbus_lookups[] __initdata = {
static struct clk_lookup xbus_lookups[] = {
{ .dev_id = "duart", .con_id = "apb_pclk"},
{ .dev_id = "80074000.serial", .con_id = "apb_pclk"},
{ .dev_id = "imx28-dma-apbx", },
{ .dev_id = "80024000.dma-apbx", },
};
static struct clk_lookup ssp0_lookups[] __initdata = {
static struct clk_lookup ssp0_lookups[] = {
{ .dev_id = "imx28-mmc.0", },
{ .dev_id = "80010000.ssp", },
};
static struct clk_lookup ssp1_lookups[] __initdata = {
static struct clk_lookup ssp1_lookups[] = {
{ .dev_id = "imx28-mmc.1", },
{ .dev_id = "80012000.ssp", },
};
static struct clk_lookup ssp2_lookups[] __initdata = {
static struct clk_lookup ssp2_lookups[] = {
{ .dev_id = "imx28-mmc.2", },
{ .dev_id = "80014000.ssp", },
};
static struct clk_lookup ssp3_lookups[] __initdata = {
static struct clk_lookup ssp3_lookups[] = {
{ .dev_id = "imx28-mmc.3", },
{ .dev_id = "80016000.ssp", },
};
static struct clk_lookup lcdif_lookups[] __initdata = {
static struct clk_lookup lcdif_lookups[] = {
{ .dev_id = "imx28-fb", },
{ .dev_id = "80030000.lcdif", },
};
static struct clk_lookup gpmi_lookups[] __initdata = {
static struct clk_lookup gpmi_lookups[] = {
{ .dev_id = "imx28-gpmi-nand", },
{ .dev_id = "8000c000.gpmi", },
};
static struct clk_lookup fec_lookups[] __initdata = {
static struct clk_lookup fec_lookups[] = {
{ .dev_id = "imx28-fec.0", },
{ .dev_id = "imx28-fec.1", },
{ .dev_id = "800f0000.ethernet", },
{ .dev_id = "800f4000.ethernet", },
};
static struct clk_lookup can0_lookups[] __initdata = {
static struct clk_lookup can0_lookups[] = {
{ .dev_id = "flexcan.0", },
{ .dev_id = "80032000.can", },
};
static struct clk_lookup can1_lookups[] __initdata = {
static struct clk_lookup can1_lookups[] = {
{ .dev_id = "flexcan.1", },
{ .dev_id = "80034000.can", },
};
static struct clk_lookup saif0_lookups[] __initdata = {
static struct clk_lookup saif0_lookups[] = {
{ .dev_id = "mxs-saif.0", },
{ .dev_id = "80042000.saif", },
};
static struct clk_lookup saif1_lookups[] __initdata = {
static struct clk_lookup saif1_lookups[] = {
{ .dev_id = "mxs-saif.1", },
{ .dev_id = "80046000.saif", },
};
@ -245,8 +245,8 @@ int __init mx28_clocks_init(void)
clks[pll2] = mxs_clk_pll("pll2", "ref_xtal", PLL2CTRL0, 23, 50000000);
clks[ref_cpu] = mxs_clk_ref("ref_cpu", "pll0", FRAC0, 0);
clks[ref_emi] = mxs_clk_ref("ref_emi", "pll0", FRAC0, 1);
clks[ref_io0] = mxs_clk_ref("ref_io0", "pll0", FRAC0, 2);
clks[ref_io1] = mxs_clk_ref("ref_io1", "pll0", FRAC0, 3);
clks[ref_io1] = mxs_clk_ref("ref_io1", "pll0", FRAC0, 2);
clks[ref_io0] = mxs_clk_ref("ref_io0", "pll0", FRAC0, 3);
clks[ref_pix] = mxs_clk_ref("ref_pix", "pll0", FRAC1, 0);
clks[ref_hsadc] = mxs_clk_ref("ref_hsadc", "pll0", FRAC1, 1);
clks[ref_gpmi] = mxs_clk_ref("ref_gpmi", "pll0", FRAC1, 2);

2
drivers/clk/spear/spear6xx_clock.c
View File

@ -298,7 +298,7 @@ void __init spear6xx_clk_init(void)
clk = clk_register_gate(NULL, "gmac_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
GMAC_CLK_ENB, 0, &_lock);
clk_register_clkdev(clk, NULL, "gmac");
clk_register_clkdev(clk, NULL, "e0800000.ethernet");
clk = clk_register_gate(NULL, "i2c_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
I2C_CLK_ENB, 0, &_lock);